Milling attachment for lathes



Sept. 2, 1952 w, QUINN 2,608,909

MILLING ATTACHMENT FOR LATHES Filed Jan. 6 1950 2 SHEETS-SHEET l fze 5/5 FIG.7 \65 (i 49 WLLIAM H.QU|NN INVENTOR.

FICHZ FlGnll m1 Sept. 2, 1952 W. H. QUINN MILLING ATTACHMENT FOR LATHES 2 SHEETS-SHEET 2 Filed Jan. 6, 1950 WELLIAM- H. QUINN INVENTOR.

BY I

Fatenteci Sept. 2, 1952 UNITED STA-res PATENT OFFlG-E, 2,608,909 MIIZLING ATTACHMEN E FOBi-LATHES I Willitmlfi Quinn, WesflGrangfiNl II I Ap ication January' fi, 1950; Seri'af- No; 13 7,071 11' claims; (01. 90-59) Ewe -invention. relates generally. tot attache-. ment's for a: lathe-rand more particularly-W03 milling= attachment adapted to bevmouhted'iorr a1 lathe for the performance of 1 all? types of? reguiarr milling operations.

Machines and apparatus such? as millingi. majehines and the like are! particularly adapteii for-the performanceon milling: operations It has been found",- however;i that: by? acl'aptinge: amovable'vise-likezmemberrto e *bediorl'thecarzmerge-mountedon thebeds ohms-ordinary: meta-1:.

lathe; suohwise-lik'e member-generally: terme-dza milling attachmentixand'zu lizing the. headlstoek: as a; driving-member for? aami'llinga'cuttert that mafiy= of these same operatibnsimay be easily" and satisfactoril performed; by; an ordinary metal "-latiiea- Accordingly; varioussa typess of milling: attach ments hawe been? developed. for: the" market; Many of: these= milling: attaohmenis;z hOWBV-GIQL; have structural and: operational: defects of: one: type or another and inpairti'cul'ar: lackzthe neces sary rig idity which: is: required;.fom the accurate: performane'e of regu-lar milling operations; An additional defect" is tl'ia'tiniany 'of theserdevieesi cannot be rotated through fu 360? air-cum,-

frenoefirrea-plane perpendi'eularztto ftheaxial line of tlie lathe bed and asr ai resu :irrcrease: the: length er time-within-whi'eli many-"operations man? be -performed; Furthermore, in;:.those instanoesi- It has also been'ii found; that many? of: these." mil-ling. atta'ehmentsrarezparticularly desirable to the' smiallishop: owners; Accordingly, manufac-- tuners; have": prepared: their: respective milling: attachments; forixsale in pres-assembiede-f-orm orl in;u1-:bui1d=it kit; formitzwhereirr the manufac turer suppliesl'a portion ofithe millingrattaohw ment i inrvsemi-machined" form with: instructions-.-

f or;the; completion of the: attachment on the shop;

owners:,--own lather However,--. these-1attachments contairrtheesame defectsabove-:mentione'd.

The'ipresent -inventiomprovidesfa novelmillingi: attaehmentewherein-t thee-above mentioned-i dim-- culties are overcome and..which maybe-easily? made andzadaptedufor useaby theesmall shop owner: from a:- minimum number: of .casting& as

wilhbehereinaftenpointedout;

Ancordin'glw it isranvobiect ofr therpresent ainvention tor: providezla': milling: attachment-:1 which-rv hesi'ezsubstantiallyzrigmronstruction.1-

' table "or connesting n'iemberits castco'ndi gitudi'nalli 'amirotatiorially, and which-'is ea invention, and" thefea'turesformirig theinven- 2. ltziscanother obj ectr o f the present inventio tor provide; a millinaiattaohmenv which I can rotate I the work: uponi'whiehv milling: operations-are to be 1 performedvthroughar360 are, Itnisz-arfurthervobject of the present inventio to: provide; a;- milli-rigr attachmentt-whiehimaryr be; manufactured. at v low cost and Whichr may; be eazsilyedaipteda-towany: typeofmetalilathe It i further object ofthe present invention"- to r provide: a, milling; attachment: may easily; eonstructeci-v by." arsmal-l -shoo owner on hise own lathe from a minimal number of tastings so as to enable the shop ownerito adapt his lathe for the performance of regular milling operations.

It is rasstiii'further object ortiie presenti ti'on to proviiieamiilir'rg attaclirnentwhichw adapted to: a. lathewiii I allow the work chucked therein to be movedv'ertieailly; horizon-tam: Ion?- attaoh'e'd to "andremovedfrorrraj lathe a's reasse'mbl'ed unit; 1

With; these and" other obj eetsi'n' view-1 a appearfrom'the"aocomp'ariyihg"speeificaitib invention consists offvariou's features of struetionandcombination of parts,- whieii wi first" described in coniriecti'on with the ac'oonT--- naming-drawings showing amilling attaehirieritition will-be specifically. pointed out in the ermine? the drawingsz Figurel" showsthebasemerrrberin itsas cast conditi'on'. V H Figure 2v shows thesupport member in ame cast conditions v Figure: 3" shows" the movable" vertical" boring:

tion'. Figure" 4"shows:the1 vise member its newest" condition.

Figure 5 is a prospective-view"oftheiinrention' mounted?on'alathec'arriaget Figure 6? is a -crossseotibrrttakenrthrougrfithe? line 6 6of"Fiu're 5'? f a Figure '7 is a cross-section taken throiigh 'tire' line l' -fiof l 'igure fi; a

Figure 8 is a side 'vi'ew or the rotatable vise' member r Figure. 9 -is.- airont viewof the rnaster slideshowingsthegib therewith. V i ure -10 iswan end view'of-the master slideshowing;thegib therewith, 1 Figure: 11;-isa front -view oi the fixed-slider Figure-1215 anendaview of the :flxed slidew I The present invention is shown in connection with an ordinary metal lathe, only a, fragment of the bed I having a carriage 2 being shown however, as the lathe and carriage do not form part of the invention herein. The carriage may be any suitable type of which there are many well known in the art, and moves in the longitudinal axis of the lathe bed. It provides both connecting means. and horizontal motion in a plane perpendicular to the longitudinal axis of the lathe bed for the invention, all of which is clearly shown in Figure of the drawings.

The invention as illustrated in fully assembled form is a truly universal milling attachment and as will appear hereinafter by removing various portions thereof may be converted into a movable vertical boring table or stationary vertical boring table to perform additional functions on the lathe.

Referring more particularly to the drawings, Figures 1,2, 3, and 4 show the as cast appearance of the main members forming the present invention. These members are subjected to machining on the ordinary lathe to provide the slots and openings, etc., by which operable connections are made and to provide surfaces which will give the invention a cosmetic appearance. The remaining portions and members including the crank springs, pins, etc. may be machined out of regular metal stock available in most machine shops or are easily purchasable on the open market.

Base member Figures 1, 5, and 6 show the base member 3 having a, substantially hemi-sected box-like appearance and formed by a connecting base 4, and a face plate 5 at approximately right angles toeach other. Side supports 6 and I are provided to lend rigidity to the base member I. In the present invention the connecting base 4 is indicated as having an opening (not shown) therethrough whereby connecting means with the carriage 2 may be provided such as a bolt 8, washer 9 and nut II), to lock the base member I in any given angular position with respect to the longitudinal axis of the lathe bed, it being understood that while this type of connecting means is shown that other connecting means embodying the same idea may be utilized for this purpose.

Markings I I may be provided on the outer edge I2 of the connecting base 4 to coact with a fixed line I3 on the carriage 2 whereby theexact angular setting desired may be set.

Base member I is also provided with two or more T-slots I4 on the face plate 5 perpendicular to the plane of thelongitudinal axis, as is clearly shown in Figures 5 and 6 of the drawings. T-slots I4 are identical in construction and may be utilized in a dual capacity, first to provide a fixed vertical boring table when the remaining members of the invention are not connected to the base member I, and second as the guide slots for the movable vertical boring table or connecting member I5.

Movable vertical boring table or connecting member member I. Slots I8, receive in snug-fit engagement a master slide I9 and a fixed slide 20, which will engage the T-slots I4 so that the boring table or connecting member I5 will be adjustably slidable on the base member but will be able to be locked in position as is hereinafter described.

Master slide I 9 and fixed slide 29 are elongated members substantially L-shaped in end view appearance as is indicated in Figures 9, 10, 11, and 12 of the drawings. Openings 2I is provided thereon whereby suitable means such as screws 22 may be passed therethrough into threaded engagement with the member I5 to fixedly connect the slides to the member I5 such that the slides I9 and 20 will fit snugly into the slots I8 as is clearly shown in Figure 6 of the drawings. The slides I9 and 20 are positioned so that the side legs 23 and 24, respectively, will face inwardly or towards each other.

Master slide I9 is further provided with an inset 25 on the side thereof away from the side leg 23 to coact with a brass gib on tongue portion 26 which snugly and slidably engages the inset 25 whereby a T-shaped appearance is formed as is indicated and clearly shown in Figures 9 and 10 of the drawings.

It will be understood that while two slides are shown'herein that the invention can be easily modified to a single master slide, substantially larger in width, which would engage a single T- slot on the base member without departing from the spirit of the invention. However, the preferred form has the added advantage of provid:

ing. a fixed vertical boring table when the base member is utilized by itself as above described.

Thus when the master slide I9 and the fixed slide 29 are fixedly connected to the member I5, member I5 may be in turn set into slidable engagement with the base member I through the T- slots I4 of the base member I, in alignment with the slots I 8. However, bronze gib 26 which snugly fits the inset 25 of the master slide I9 may also be positioned in the sameT-slot I4 that the master slide I9 engages. sitioned will not be slidable however, as set screws 2! which threadedly engage the side of the face plate 5 will extend inwardly to contact locking inserts 28 on the bronze gib 26 to keep it from sliding when the movable vertical boring table or connecting member I5 is moved upwardly or downwardly as hereinafter described.

This construction wherein the bronze gib 26 is angularly engaged with the inset 25 of the master slide I9 serves many purposes among which are, increasing the rigidity of the structure, regulating the freedom of sliding movement of the connecting member I5, and acting as a locking means to lock the connecting member inany desired position. These results are effected by adjusting the set screws 21, which causes the bronze gib 26 to move in a sidewise direction. This will increase the force of the surface to surface engagement between the master slide I9 and the bronze gib 26 and due to the angular relationship will increase the amount of surface contact between the rear portions of the master slide I9, the fixed slide 29, and the connecting member I5 with the respective T-slots I4 and the face plate 5 on the base member I.

The increased surface contact increases the friction thus controllin the freedom of sliding movement and in addition the increased surface contact gives increased rigidity. Locking means is effected by merely tightening the set screws 21 when theconnecting member is in a desired The bronze gib 26 when so po- 7 a pointer 68 or fixed line perpendicular to the axial line of the lathe bed may also be provided at some suitable location on the connector such as is shown on the projection It, so that any desired angular setting may be accurately determined by rotating the vise member 44.

'Thus, in operation the invention is assembled as above described and locked to the carriage 2 by means of bolt and nut.

The work (not shown) is locked in the vise member by means of the gripping screws 60 which are threaded downwardly into contact with the work forcing it against the surface 58. The visemember 44 is then turned to the desired angular position and locked in this position by threading the plug 48 inwardly into the bore 46 to force the locking pin 50 into locking engagement with the annular groove as above described.

The work may now be moved in the longitudinal line of the lathe bed by manipulating the carriage until it approaches the head stock (not shown) of the lathe which is provided with a suitable cutting tool. Thereafter the work may be manipulated in any horizontal or vertical plane within the limits of the screw members by means of the crank 69 on the carriage and the crank 3'! on the invention which are attached thereto whereby a given milling operation may be performed.

If it is desired to change the angular position of the work either in the horizontal plane or the vertical plane the carriage may be moved away fromhead stock and either the base member I reset or the vise member 44 reset or both, whichever is desirable.

As already pointed out by merely removing the vise member 44 and utilizing the transverse T-slots on the face of the connecting member 15, a movable vertical boring table will be formed by utilizing T-nuts, studs and clamps therewith. And by the additional removal of the connecting member l5, a fixed vertical boring table is also provided as the T-slots l6 thereon may be adapted for use with suitable T-nuts, studs and clamps; T-nuts, studs and clamps being well known in the art when used in this fashion.

While one form of the invention has been illustrated and described, it is obvious that those skilled in the art may vary the details of construction as well as the precise arrangement of parts without departing from the spirit of the invention and, therefore, it will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown but that they may be widely modified within the invention defined by the claims.

What is claimed is:

1. An attachment for lathes having a movable carriage thereon comprising, a base member adapted to be mounted on said carriage, vertically disposed T-slots on said base member, a connecting member, a master slide and a fixed slide fixedly connected to said connecting member, said master slide and said fixed slide to provide slidable connecting means between said connecting member and said T-slots, a vice member rotatably I mounted on said connecting member, a support member mounted on the base member, a screw member in threaded engagement with said support member in the axial line of the connecting member, said screw member adapted to engage said connecting member to move said connecting member in the vertical plane only, an angular inset formed in the master slide, adjustable means 8 mounted in said inset for contact with said connecting member to provide locking means to lock the connecting member in a desired position, and means for locking the vise member in any desired angular position.

2. An attachment for lathes as claimed in claim 1 wherein the adjustable means contacting the inset comprises, a gib having an angular face in snug engagement with the inset, set screws threadably mounted on said base member to engage and move the gib into increased surface to surface engagement with the inset.

3. An attachment for lathes as claimed in claim 1 wherein the means for locking the vise member in any desired position comprises, a bore formed inthe connecting member in a plane perpendic- Ular to the axial line of the vise member, a locking pin movably mounted in said bore and positioned so as to contact the vise member, and adjustable means to contact said pin for sidewise movement into and out of locking contact with the vise member.

4. An attachment for lathes having a movable carriage thereon comprising, a base member adapted to be mounted on said carriage, vertically disposed T-slots on said base member, a connecting member, a master slide and a fixed slide fixedly connected to said connecting member, said master slide and said fixed slide to provide slidable connecting means between said connecting member and said T-slots, a vise member rotatably mounted on said connecting member, a support member, said screw member and said connecting v member so constructed and arranged that when the screw member is rotated the connecting member will move therewith in the vertical planeonly, an angular inset formed in the master slide, a gib having an angular face in snug engagement with said inset, set screws threadably mounted in said base member to engage said gib for sidewise movement thereof and to hold it from sliding movement with the master slide, a bore formed in said connecting member perpendicular to the axial line of the lathe bed and contiguous to the vise member, a locking pin movably mounted in said bore and positioned to contact the vise member at said contiguous point, resilient means to engage said locking pin, and a plug threaded into said bore to abut the resilient means whereby the locking pin is moved in a sidewise direction by threading the plug into and out of the bore.

5. An attachment for lathes as claimed in claim 4 wherein the locking pin is provided with an arcuate recess so that the vise member may be passed in position when it is mounted on the connecting member.

6. An attachment for lathes having a movable carriage thereon comprising, a base member adapted to be mounted on said carriage, vertically disposed T-slots on said base member, a connecting member, a master slide and a fixed slide fixedly connected to said connecting member, said master slide and said fixed slide to provide slidable connecting means between said connecting member and said T-slots, a support member mounted on the base member, a screw member in threaded engagement with said support member in the axial line of the connecting member, said screw member and said connecting member so constructed and arranged that when the screw member is rotated the connecting member will move therewith in the vertical plane only, an an.-.

gular inset on the master slide, a gib having an angular face in snug engagement with said inset, set screws threadably mounted in'said base member to engage said gib for sidewise movement thereof and to hold it from sliding movement with the master slide to increase the rigidity and control the slidability of the connecting member and to provide locking means for the connecting member, an enlarged bore in said connecting member, a vise member having connecting means thereon to be rotatably mounted in said enlarged bore, and locking means for engagement with said connecting means to lock the vise member in any desired angular position.

7. An attachment for lathes as claimed in claim 6 wherein the connecting means for rotatably mounting the vise member in the enlarged bore comprises, a cylindrical rearward projection on said vise member, an annular groove on said projection forming an inner annulus and an outer annulus, and a cut-away on said outer annulus to allow the outer annulus to pass under said locking means.

8. An attachment for lathes as claimed in claim 6 wherein the locking means for engagement with the connecting means comprises, a transverse bore tangential to the enlarged bore in the connecting member, a locking pin movably mounted in said tangential bore, an arcuate recess on said locking pin to contact the connecting means on said vise member, and adjustable mean to contact said locking pin for sidewise movement thereof into and out of locking contact with the vise member. v

9. An attachment for lathes having a movable carriage thereon comprising, a base member adapted to be mounted on said carriage, vertically disposed T-slots on said base member, a connecting member, a master slide and a fixed slide fixedly connected to said connecting member, said master slide and said fixed slide to provide slidable connecting means between said connecting member and said T-slots, a support member mounted on the base member, a screw member in threaded engagement with said support member in the axial line of the connecting member, said screw member and said connecting member so constructed and arranged that when the screw member is rotated the connecting member will move therewith in the vertical plane only, an angular inset on the master slide, a gib having an angular face in snug engagement with said inset, set screws threadably mounted in said base member to engage said gib for sidewise movement thereof and to hold it from sliding movement with the master slide to increase the rigidity and control the slidability of the connecting member and to provide locking means for the connecting member, an enlarged bore in said connecting member, a vise member having connecting means thereon to be rotatably mounted in said enlarged bore, said contacting means comprising a rearward projection formed on said vise member, and an annular groove in said rearward projection forming an inner annulus and an outer annulus, a transverse bore tangential to the enlarged bore in the connecting member, a locking pin movably mounted in said tangential bore, an arcuate recess on said locking pin to contact said annular groove on the connecting means, a cut-out on said outer annulus whereby said connecting means may be passed under said locking means, and adjustable means to contact said locking pin for sidewise movement thereof into and out of locking contact with the vise member.

10. An attachment for lathes as claimed in claim 9 wherein the adjustable means to contact the locking in for sidewise movement comprises, a resilient means abutting the locking pin, and a plug threadably engaging the bore and acting against said resilient means to be threaded into and out of the bore for movement of said locking 11. An attachment for lathes having a carriage thereon comprising, a base member adapted to be mounted on said carriage, at least one vertically disposed T-slot on said base member, a connecting member, at least one slide fixedly connected to said connecting member, said slide to provide a slidable connecting means between said connecting member and said T-slot, a vise member rotatably mounted on said connecting member, means for moving said connecting member in the vertical plane including, a screw support member mounted on said base member, an internally threaded bushing mounted in said screw support member in the axial line of the connecting member, an externally threaded screw member rotatably engaging said bushing, a tongue on one end of said screw member, a crank on the other end of said screw member, a slot for engagement with said tongue on the connecting member, said tongue and said slot arrangement being constructed and arranged to transmit motion to the connecting member in the vertical plane only when the screw member is rotated, adjustable means angularly disposed to said slide to provide locking means to lock the connecting member in any desired position, and means for locking the vise member in any desired position.

WILLIAM H. QUINN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

